1. Open, a не to open. 2. There was, a не it was. 3. For, a не since. 4. To do the washing-up, a не to wash up. 5. Doesnt, a не isnt. 6. Mice, a не mouse. 7. Shouldnt ask, a не dont have to ask. 8. Sisters, a не sister. 9. He be, a не be he. 10. Dont have.